The long-term goal of the principal investigator is to enter into the field of microbial pathogenesis. The research and training program outlined in this proposal is designed to efficiently facilitate this transition. The research proposal is based on a highly tractable experimental system that will provide experience in microbial genetics, comparative genomics and in vivo assessments of bacterial-host interactions. Targeted coursework, seminars, journal clubs, group meetings, participation in national meetings and strategic collaborations will supplement laboratory research to provide a comprehensive training program. For the past several decades, the field of microbial pathogenesis has focused almost exclusively on understanding the roles of virulence factors in colonization and disease. The physiology of pathogenic bacteria has been relatively unexplored and the career transition outlined here will be advantageous to both the applicant and the field. The proposed research focuses on understanding interconnections between energy metabolism and virulence using Bordetella species as model organisms. Previous biochemical analysis by another laboratory established that virulent and avirulent Bordetella strains contain different types of cytochrome oxidases. This suggests that cytochrome oxidase synthesis is regulated, however, the implication for virulence is unknown. The PI plans to systematically investigate the relative contributions of cytochrome oxidases to the infectious cycle.
In Aim 1, a comprehensive expression profile of all cytochrome oxidase genes will be conducted to characterize virulencedependent and -independent mechanisms of regulation.
In Aim 2, deletion and ectopic expression mutants of the cytochrome oxidases will be generated and characterized. The relative contributions of cytochrome oxidase to the infectious cycle will be analyzed in Aim 3 using high-resolution animal models of respiratory tract infection.

Agency
National Institute of Health (NIH)
Institute
National Institute of Allergy and Infectious Diseases (NIAID)
Type
Research Scientist Development Award - Research (K02)
Project #
5K02AI061048-04
Application #
7198069
Study Section
Microbiology and Infectious Diseases B Subcommittee (MID)
Program Officer
Khambaty, Farukh M
Project Start
2004-07-01
Project End
2009-03-31
Budget Start
2007-04-01
Budget End
2008-03-31
Support Year
4
Fiscal Year
2007
Total Cost
$93,789
Indirect Cost
Name
University of California Los Angeles
Department
Microbiology/Immun/Virology
Type
Schools of Medicine
DUNS #
092530369
City
Los Angeles
State
CA
Country
United States
Zip Code
90095